lavc/qsv: add memory type message

Signed-off-by: Zhong Li <zhong.li@intel.com>

libavcodec/qsv.c

@@ -137,6 +137,35 @@ int ff_qsv_level_to_mfx(enum AVCodecID codec_id, int level)
     }
 }
 
+static const struct {
+    int mfx_iopattern;
+    const char *desc;
+} qsv_iopatterns[] = {
+    {MFX_IOPATTERN_IN_VIDEO_MEMORY,     "input is video memory surface"         },
+    {MFX_IOPATTERN_IN_SYSTEM_MEMORY,    "input is system memory surface"        },
+    {MFX_IOPATTERN_IN_OPAQUE_MEMORY,    "input is opaque memory surface"        },
+    {MFX_IOPATTERN_OUT_VIDEO_MEMORY,    "output is video memory surface"        },
+    {MFX_IOPATTERN_OUT_SYSTEM_MEMORY,   "output is system memory surface"       },
+    {MFX_IOPATTERN_OUT_OPAQUE_MEMORY,   "output is opaque memory surface"       },
+};
+
+int ff_qsv_print_iopattern(void *log_ctx, int mfx_iopattern,
+                           const char *extra_string)
+{
+    const char *desc = NULL;
+
+    for (int i = 0; i < FF_ARRAY_ELEMS(qsv_iopatterns); i++) {
+        if (qsv_iopatterns[i].mfx_iopattern == mfx_iopattern) {
+            desc = qsv_iopatterns[i].desc;
+        }
+    }
+    if (!desc)
+        desc = "unknown iopattern";
+
+    av_log(log_ctx, AV_LOG_VERBOSE, "%s: %s\n", extra_string, desc);
+    return 0;
+}
+
 static const struct {
     mfxStatus   mfxerr;
     int         averr;

libavcodec/qsv_internal.h

@@ -101,6 +101,9 @@ typedef struct QSVFramesContext {
     int  nb_mids;
 } QSVFramesContext;
 
+int ff_qsv_print_iopattern(void *log_ctx, int mfx_iopattern,
+                           const char *extra_string);
+
 /**
  * Convert a libmfx error code into an ffmpeg error code.
  */

libavcodec/qsvdec.c

@@ -193,6 +193,8 @@ static int qsv_decode_preinit(AVCodecContext *avctx, QSVContext *q, enum AVPixel
         iopattern = MFX_IOPATTERN_OUT_SYSTEM_MEMORY;
     q->iopattern = iopattern;
 
+    ff_qsv_print_iopattern(avctx, q->iopattern, "Decoder");
+
     ret = qsv_init_session(avctx, q, session, avctx->hw_frames_ctx, avctx->hw_device_ctx);
     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR, "Error initializing an MFX session\n");